<p dir="ltr">Thanks Joe, </p>
<p dir="ltr">I did not mean to suggest using tmy data but did mean that actual weather data for the billing period should be used. </p>
<p dir="ltr"> One of my favorite sources of real time data is weather underground. They have a lot of smaller weather stations and a great archive. </p>
<p dir="ltr">Cheers, </p>
<p dir="ltr">Mike </p>
<div class="gmail_quote">On Jun 22, 2015 10:17 PM, "Joe Huang" <<a href="mailto:yjhuang@whiteboxtechnologies.com">yjhuang@whiteboxtechnologies.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
Maybe I'm missing something here, but why can't you just count up
the degree days for the utility period?<br>
I hope you're not working with average or "typical year" degree
days, but the degree days from the same time period.<br>
<br>
I also recall that the old Princeton Scorekeeping Method (PRISM)
back in the 1980's allows the user to enter the degree days for that
time period, so it's not a new problem.<br>
<br>
Joe<br>
<br>
<pre cols="90">Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 205A
Moraga CA 94556
<a href="mailto:yjhuang@whiteboxtechnologies.com" target="_blank">yjhuang@whiteboxtechnologies.com</a>
<a href="http://weather.whiteboxtechnologies.com" target="_blank">http://weather.whiteboxtechnologies.com</a> for simulation-ready weather data
(o) <a href="tel:%28925%29388-0265" value="+19253880265" target="_blank">(925)388-0265</a>
(c) <a href="tel:%28510%29928-2683" value="+15109282683" target="_blank">(510)928-2683</a>
"building energy simulations at your fingertips"
</pre>
<div>On 6/22/2015 6:09 AM, Jones,
Christopher wrote:<br>
</div>
<blockquote type="cite">
<div>
<p class="MsoNormal"><span>When
calibrating an energy model to utility bills the utility
bills often don’t align with the month start and end. I
have reviewed a couple methods to calendar normalize the
utility bills but find them somewhat unsatisfactory.<u></u><u></u></span></p>
<p class="MsoNormal"><span><u></u> <u></u></span></p>
<p class="MsoNormal"><span>For example
the method I am looking at does the following:<u></u><u></u></span></p>
<p class="MsoNormal"><span>The April
gas bill runs from March 25 – April 24. The algorithm takes
the average number of m3 per day from that bill, applies it
to the days in April. Then it takes the average number of
days from the May bill which runs from April 24 – May 25 and
applies that average to the remaining days in April.
<u></u><u></u></span></p>
<p class="MsoNormal"><span><u></u> <u></u></span></p>
<p class="MsoNormal"><span>The issue
is that the March-April period has much higher HDD than the
April-May period and the “normalized” gas usage is
significantly lower than the simulation data for April.<u></u><u></u></span></p>
<p class="MsoNormal"><span><u></u> <u></u></span></p>
<p class="MsoNormal"><span>I am
wondering if there are any papers or other sources of
information as to how others approach this problem.<u></u><u></u></span></p>
<p class="MsoNormal"><span><u></u> <u></u></span></p>
<p class="MsoNormal"><span><u></u> <u></u></span></p>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><img src="cid:part1.08050307.08030902@whiteboxtechnologies.com" alt="cid:image003.png@01D09C46.E75BA0D0" height="43" width="108"></span><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1c467a"><u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1c467a">Christopher
Jones,</span></b><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d"></span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d">P.Eng.<i>
<br>
</i></span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d" lang="EN-CA">Senior Engineer<b><u></u><u></u></b></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d" lang="EN-CA"><u></u> <u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d" lang="EN-CA">WSP Canada Inc.<u></u><u></u></span></b></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d" lang="EN-CA">2300 Yonge Street, Suite 2300<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d" lang="EN-CA">Toronto, ON M4P 1E4</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#595959" lang="EN-CA"><br>
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d" lang="EN-CA">T <a href="tel:%2B1%20416-644-4226" value="+14166444226" target="_blank">+1 416-644-4226</a><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d" lang="EN-CA">F <a href="tel:%2B1%20416-487-9766" value="+14164879766" target="_blank">+1 416-487-9766</a><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d" lang="EN-CA">C <a href="tel:%2B1%20416-697-0065" value="+14166970065" target="_blank">+1 416-697-0065</a><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d" lang="EN-CA"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d" lang="EN-CA"><a href="http://www.wspgroup.com/" target="_blank">www.wspgroup.com</a>
</span><i><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#565656" lang="EN-CA"><u></u><u></u></span></i></p>
</div>
<p class="MsoNormal"><span><u></u> <u></u></span></p>
</div>
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